Special Notice #273: Possible Nova in Ophiuchus = PNV J17260708-2551454
March 28, 2012: A possible nova in Ophiuchus was announced on the IAU CBAT Transient Objects Confirmation Page (TOCP) page with the name PNV J17260708-2551454. It was discovered by H. Nishimura (Shizuoka-ken, Japan) at unfiltered magnitude 12.1 on 2012 March 25.789 UT on three frames using Canon 200-mm f/3.2 lens + Canon EOS 5D Digital Camera. Spectra suggest that the object is an Fe II-type classical nova.
Coordinates: 17 26 07.01 -25 51 42.69 (J2000.0)
T. Krajci, from a single R filtered image with AAVSONet telescope K35 (1.25 arcsec/pixel, V=12) at Astrokolkhoz, Cloudcroft, NM;
RA 17 26 07.02, Dec -25 51 42.65 (S. Kiyota, Tsukuba, Japan, via TOCP);
RA 17 26 07.02 Dec -25 51 42.5 (T. Yusa, Osaki, Japan, via TOCP);
Nishimura confirmed the object on images taken on 2012 Mar. 26.796 UT at magnitude 12.3. The object was also confirmed by several other individuals, including (from TOCP page):
S. Kiyota, Mar. 27.4208 UT (Tsukuba, Japan, images at http://meineko.sakura.ne.jp/ccd/PNV_J17260708-2551454-120327.jpg);
T. Yusa, Mar. 27.45902 UT (Osaki, Japan, image at: http://space.geocities.jp/yusastar77/supernova/PNinOph_120327.htm);
E. Guido, A. Tripp, N. Howes, and G. Sostero (via vsnet-alert 14387), Mar. 27.4851 UT, remotely through the 0.10-m f/5 reflector + CCD at Mayhill Station, NM (Remanzacco Observatory, Italy, image and animation at http://remanzacco.blogspot.com);
Spectra obtained by A. Arai and M. Isogai (KAO, Kyoto Sangyo University) on 2012 Mar. 27.74 UT using the 1.3-m Araki telescope at the Koyama Astronomical Observatory (KAO) suggest that the object is an Fe II-type classical nova.
Visual and CCD observations reported via the TOCP include:
Mar. 20.784 UT, <13.0 (T. Kojima, Gunma-ken, Japan, Canon EOS 40D + 150-mm f/2.8 lens);
24.785, 12.2 (Kojima);
25.758, 12.2 (Kojima);
26.752, 12.7 (STL-6303E and 100mm lens, A. Takao, Kitakyushu, Japan);
27.4, 13.27 B (S. Kiyota, Tsukuba, Japan);
27.4, 12.37 V (Kiyota);
27.4, 11.88 Rc (Kiyota);
27.4, 11.11 Ic (Kiyota);
27.45902, 12.6 unfiltered (T. Yusa, Osaki, Japan, remotely using a 0.25-m f/3.4 hyperbolic astrograph + unfiltered CCD (SBIG ST-10XME) at the RAS Observatory near Mayhill, NM, USA);
Charts may be plotted using the AAVSO Variable Star Plotter (VSP) at http://www.aavso.org/vsp.
Until an official name is announced, please report observations to the AAVSO International Database as PNV J17260708-2551454.
Congratulations to H. Nishimura on his discovery!
This AAVSO Special Notice was compiled by Elizabeth O. Waagen.
SUBMIT OBSERVATIONS TO THE AAVSO
Information on submitting observations to the AAVSO may be found at:
SPECIAL NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION
A Special Notice archive is available at the following URL:
Subscribing and Unsubscribing may be done at the following URL: